Pharmacokinetics of inhaled methyl chloride (CH3Cl) in male volunteers. 1985

R J Nolan, and D L Rick, and T D Landry, and L P McCarty, and G L Agin, and J H Saunders

Six volunteers, 25-41 years of age, were exposed for 6 hr on separate days to 50 and 10 ppm of CH3Cl. Blood and expired air CH3Cl concentrations reached an apparent plateau during the first hour of the exposure and were proportional to the exposure concentration. Consistent with previous reports, the volunteers could be separated into two discrete groups based on the differences observed in their blood and expired air CH3Cl concentrations. Both groups eliminated CH3Cl rapidly once the exposure was terminated, but CH3Cl was eliminated more rapidly by those volunteers with the lower blood and expired air CH3Cl concentrations. The existence of these two groups can be explained by a twofold difference in the rate at which they metabolized CH3Cl; however, this difference is of questionable toxicological significance. Urinary excretion of the putative metabolite S-methyl cysteine was not related to the exposure; thus, it is not a valid means of monitoring occupational exposure to CH3Cl.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008297 Male Males
D008737 Methyl Chloride A hydrocarbon used as an industrial solvent. It has been used as an aerosal propellent, as a refrigerant and as a local anesthetic. (From Martindale, The Extra Pharmacopoeia, 31st ed, p1403) Chloromethane,Chloride, Methyl
D003545 Cysteine A thiol-containing non-essential amino acid that is oxidized to form CYSTINE. Cysteine Hydrochloride,Half-Cystine,L-Cysteine,Zinc Cysteinate,Half Cystine,L Cysteine
D005740 Gases The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D013438 Sulfhydryl Compounds Compounds containing the -SH radical. Mercaptan,Mercapto Compounds,Sulfhydryl Compound,Thiol,Thiols,Mercaptans,Compound, Sulfhydryl,Compounds, Mercapto,Compounds, Sulfhydryl

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